I'm very active and consider myself to be in great shape. Will ONYX challenge me?

100%. Honestly, this is the workout for you.

Here's what catches people off guard: everything is slow and controlled. No momentum to hide behind, no reps to rush through. Just time under tension and nowhere to cheat. If you've built your fitness on speed and power, ONYX will find the gaps — and it will find them in about eight minutes.

It's also endlessly customizable. One small cue from your coach — a shift in your hips, a change in your angle — and the same position becomes a completely different animal. Your coach will keep dialing it up as long as you can take it.

Athletes tell us all the time that ONYX is the hardest thing they've ever done. Then they book their next class before they leave the studio.